WHOIS / RDAP Lookup
Look up public domain registration data using RDAP.
Think & strategise
Online chess
A classic chessboard, against the computer or with a friend.
Play chess →
Think & strategise
Online draughts
A classic 100-square board, against the computer or with a friend.
Play draughts →
Your essentials
All apps →
QR code generator
Create a QR code from text or a URL.
Password generator
Generated locally: your password never leaves your browser.
Loan calculator
Estimate monthly payments, interest and total cost.
Image compressor
Re-encode JPEG/WebP locally with adjustable quality.
Unit converter
Length, mass and temperature.
Text counter
Count words, characters and lines, and estimate reading time.
VAT calculator
Add or remove VAT using a custom rate.
A tool for every task
Internet & Networks4 tools
Security11 tools
Developer15 tools
Text10 tools
Images & PDF8 tools
Finance & Calculations16 tools
Dates & Time11 tools
Webmaster & SEO5 tools
Generators6 tools
Other tools14 toolsDatamac Games — Shadows & Light
30 adventures and challenges, including 10 new games, with the saga's companions.
NEW
Arcade
NEWFalling Crystals
Arrange the crystal blocks and complete rows to release the light.
Play →Puzzle
NEWHidden Shadows
Find the ten hidden shadows and use the numbers to reveal safe crystals.
Play →Puzzle
NEWThe Crystal Temple
Push the crystals onto the golden plinths in the temple's five rooms.
Play →Words
Néria's Secret Word
Guess a five-letter word in six tries with Néria's clues.
Play →Arcade
Lumou Flight
Fly Lumou through the rifts of the Void.
Play →Puzzle
Lumou vs Thanar
Challenge Thanar and line up three symbols of light.
Play →Memory
Memory of Light
Find matching pairs of the saga's companions.
Play →Observation
Lumah's Constellations
Connect the stars and reveal a new constellation.
Play →
All apps
100 tools
Age calculator
Calculate your age and the number of days elapsed.
Unicode / Code Point
Inspect Unicode code points.
Aspect ratio calculator
Calculate a dimension while keeping the aspect ratio.
Mean & median
Analyse a list of numbers.
Base64
Encode or decode text without a server.
Binary / Decimal / Hex
Convert an integer between number bases.
BMI calculator
Calculate an indicative body mass index.
CSS Box Shadow
Build a CSS shadow visually.
Working days
Count weekdays from Monday to Friday between two dates.
CAGR calculator
Compound annual growth rate.
Case converter
Quickly change the case of your text.
Circle calculator
Area, circumference and diameter.
HEX / RGB colours
Convert HEX to RGB and preview the colour.
Compound interest
Simulate the growth of an investment with monthly contributions.
CSS Minifier
Minify CSS locally to reduce its size.
CSV ⇄ JSON
Convert simple CSV to JSON locally, and vice versa.
Data size converter
Convert bytes, KiB, MiB, GiB and TiB (base 1024).
Date calculator
Add or subtract days from a date.
Date difference
Calculate the number of days between two dates.
Discount calculator
Calculate the discounted price and your savings.
DNS Lookup
Query public DNS using DNS over HTTPS.
Electricity cost
Calculate electricity consumption in kWh and its cost.
Favicon Generator
Create a square PNG favicon from an image.
File checksum
Calculate the SHA-256 hash of a local file without uploading it.
Find / replace
Replace every occurrence in a text.
Fuel consumption
Calculate L/100 km and journey cost.
GCD / LCM
Calculate the GCD and LCM of two integers.
CSS Gradient
Generate a linear CSS gradient.
Hash generator
Calculate SHA-256, SHA-384 or SHA-512 locally.
Decimal hours
Convert hours and minutes to decimal hours.
HTML Entities
Encode or decode special HTML characters.
IBAN validator
Check the structure and MOD-97 checksum of an IBAN locally.
Image compressor
Re-encode JPEG/WebP locally with adjustable quality.
Image converter
Convert an image locally to PNG, JPEG or WebP.
Image information
Display the dimensions, type and size of a local image file.
Image Resizer
Resize an image entirely in your browser.
JSON String Escape
Escape or unescape a JSON string.
JSON Formatter
Format, minify and validate JSON locally.
JSON Key Sorter
Sort the keys of a JSON object recursively.
JWT Decoder
Decode a JSON Web Token's header and payload locally. No cryptographic verific…
Loan calculator
Estimate monthly payments, interest and total cost.
Lorem Ipsum
Quickly generate placeholder text.
Profit margin
Calculate gross profit, markup and margin percentage.
Markdown Preview
Write Markdown and preview it instantly, without a server.
Meta Tag Generator
Generate essential SEO meta tags.
MIME Types
Quickly find the MIME type of common web file formats.
MX Lookup
Find the mail servers listed for a domain.
Open Graph Generator
Create the main Open Graph tags.
Paint calculator
Estimate the litres needed from the area and coverage rate.
Colour palette generator
Create a harmonious HSL palette from a hue.
Passphrase Generator
Generate a passphrase from a local word list.
Password generator
Generated locally: your password never leaves your browser.
Password strength checker
Estimate password strength locally without sending it anywhere.
Percentage calculator
Three common calculations in one tool.
Percentage change
Calculate the percentage change between two values.
PIN generator
Generate a random PIN locally.
Prime number checker
Check whether an integer is prime.
QR code generator
Create a QR code from text or a URL.
QR Email
A QR code that opens a new email message.
Phone QR
A QR code for calling a number.
QR SMS
A QR code for composing a text message.
QR Wi-Fi
A QR code for sharing a Wi-Fi network.
Quadratic equation
Solve ax² + bx + c = 0.
Random number
Generate a random integer between two limits.
Random token
Generate a cryptographically random hexadecimal token.
Rectangle area
Calculate the area and perimeter of a room or space.
Regex Tester
Test a JavaScript regular expression right in your browser.
Remove duplicates
Remove duplicate lines.
Reverse text
Reverse the characters in a text.
robots.txt Generator
Build a simple robots.txt file.
ROI calculator
Calculate a simple return on investment.
Rule of three
Calculate a proportion instantly.
Savings goal
Calculate the monthly amount needed to reach a goal, without interest.
Screen resolutions
Calculate common resolutions from an aspect ratio.
Screen size
Calculate a screen's width and height from its diagonal.
Simple interest
Calculate simple interest.
Sitemap XML Generator
Turn a list of URLs into an XML sitemap.
Slug generator
Turn a title into a clean URL slug.
Sort lines
Sort lines alphabetically.
Speed · Distance · Time
Calculate average speed.
Stopwatch
A simple, precise stopwatch in your browser.
IPv4 / CIDR calculator
Calculate the mask, network, broadcast address and number of addresses.
Text comparison
Compare two texts line by line.
Tile calculator
Estimate the quantity of tiles, allowing for waste.
Timer
A local timer with a browser sound alert.
Unix Timestamp
Convert between date/time and Unix timestamps.
Clean up whitespace
Remove unnecessary spaces and empty lines.
Journey cost
Estimate fuel use and cost per kilometre.
Unit converter
Length, mass and temperature.
URL Encoder / Decoder
Encode or decode special characters in a URL.
URL Parser
Break a URL down into its components.
UTM Builder
Build a campaign URL with UTM parameters.
UUID generator
Generate UUID v4 identifiers locally using the browser's cryptographic API.
UUID Validator
Check the format of a UUID.
VAT calculator
Add or remove VAT using a custom rate.
Volume calculator
Calculate the volume of a rectangular prism.
ISO week number
Find the ISO week number for a date.
WHOIS / RDAP Lookup
Look up public domain registration data using RDAP.
Text counter
Count words, characters and lines, and estimate reading time.
Word frequency
Rank the most frequent words.
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